Special frequency converter for steeply inclined coal seam mining machine

Abstract

The utility model relates to a special frequency converter of steeply inclined coal seam coal mining machine belongs to coal mining machine technical field, a special frequency converter of steeply inclined coal seam coal mining machine, including frequency converter body and coal mining machine electric control box, the frequency converter body is installed in the coal mining machine electric control box, the bottom of frequency converter body is equipped with guide sliding block, the surface that the coal mining machine electric control box with the bottom of frequency converter body is in contact is equipped with guide slot, guide sliding block with the guide slot cooperation, make the frequency converter body can reciprocatingly move along the direction that the guide slot sets.

Description

Technical Field

[0001] This utility model relates to the field of coal mining machine technology, specifically to a frequency converter for a steeply inclined coal seam coal mining machine. Background Technology

[0002] In steeply inclined coal seam mining operations, the coal mining machine, as the core equipment, faces unique working conditions. When the working face dip angle reaches 65 degrees, the difficulty of equipment maintenance increases exponentially, with frequency converter replacement being particularly challenging. Maintaining electromechanical equipment in this steep-angle environment not only tests the operational skills of engineers but also places stringent requirements on equipment design, operational procedures, and safety protection systems. The most prominent issue is the gravitational interference effect: on a 65-degree steep slope, the downward force generated by the frequency converter's own weight can be 3.5 times that under horizontal conditions (for a 200kg machine, the downward force exceeds 1700N). Operators must achieve millimeter-level precision alignment and installation while resisting the equipment's own weight. Another challenge is spatial constraints: the height of the coal mining machine's installation chamber is typically no more than 1.8 meters, and the width is limited to within 1.2 meters. Operators must move the equipment in a cramped position, with less than 30cm of clearance in the working space.

[0003] In practical operation, there are multiple technical obstacles in the process of pushing the frequency converter from the outside to the inside. When stacking frequency converters installed upwards, it is not easy to push them onto the limit pins, and the installation is more laborious. Maintenance work in confined spaces is difficult, and frequency converter replacement can take up to 8 hours, far exceeding the 1.5-hour standard for horizontal working surfaces. Utility Model Content

[0004] The purpose of this utility model is to address the above-mentioned problems by providing a dedicated frequency converter for steeply inclined coal seam mining machines, which simplifies equipment maintenance and greatly saves installation time.

[0005] The purpose of this utility model is achieved as follows:

[0006] A frequency converter for a steeply inclined coal seam mining machine includes a frequency converter body and a coal mining machine electrical control box, wherein the frequency converter body is installed inside the coal mining machine electrical control box;

[0007] The bottom of the inverter body is provided with a guide slider;

[0008] The surface of the coal mining machine electrical control box that contacts the bottom of the frequency converter body is provided with a guide groove. The guide slider and the guide groove cooperate to allow the frequency converter body to move back and forth along the direction set by the guide groove.

[0009] The coal mining machine electrical control box has at least one opening, and the guide groove extends from the opening to one end away from the opening;

[0010] A limiting pin is provided at the end of the guide groove away from the opening;

[0011] The guide slider moves along the guide groove from the opening toward the limiting pin. When the guide slider abuts against the limiting pin, the inverter body is installed in place in the coal mining machine electrical control box.

[0012] The guide groove has an inwardly recessed guide limiting groove at one end near the limiting pin.

[0013] The inverter body has a screw hole at its bottom; when the inverter body is installed in the coal mining machine control box, the bottom end near the opening has a protrusion that protrudes from the end face of the inverter body near the opening, and the screw hole is located in the protrusion.

[0014] The surface of the coal mining machine electrical control box that contacts the bottom of the frequency converter body is provided with mounting holes that match the screw holes.

[0015] The limiting pin has a limiting receiving groove on the side facing the opening;

[0016] When the inverter body is installed in the coal mining machine control box, at least a portion of the guide slider is housed in the limiting receiving groove.

[0017] Wherein, the surface of the limiting receiving groove opposite to the guide slider is a first inclined surface, and the first inclined surface slopes downward from the side into which the guide slider enters to the other side;

[0018] The surface of the guide slider opposite to the limiting receiving groove is a second inclined surface, which corresponds to the first inclined surface.

[0019] The surface of the coal mining machine electrical control box that contacts the bottom of the frequency converter body is coated with thermally conductive silicone grease.

[0020] The inverter body has two opposing side facades, which are perpendicular to the bottom of the inverter body and are arranged along the length of the guide groove.

[0021] When the inverter body is installed in the coal mining machine electrical control box, the side facade near the opening has a protrusion that protrudes from the end face of the inverter body near the opening, and the protrusion is provided with a handle.

[0022] The beneficial effects of this utility model are as follows: by setting a guide limit groove at the bottom of the coal mining machine electrical control box and a guide slider on the inverter body, the inverter can be pushed into place smoothly during installation, which greatly saves installation time. Attached Figure Description

[0023] Figure 1 This diagram shows a structural diagram of an embodiment of the frequency converter for steeply inclined coal seam mining machines of this utility model;

[0024] Figure 2 It shows Figure 1 AA section diagram;

[0025] Figure 3 It shows Figure 2 A schematic diagram showing the initial installation of the intermediate frequency converter body;

[0026] Figure 4 The diagram shows the structure of the frequency converter body in the special frequency converter for steeply inclined coal seam mining machines of this utility model.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1-Inverter body;

[0029] 11-Guide slider, 12-Protrusion, 13-Screw hole, 14-Side facade, 15-Protrusion, 16-Handle;

[0030] 2-Coal mining machine electrical control box;

[0031] 21-Opening, 22-Guide groove, 23-Limit pin, 24-Guide limit groove. Detailed Implementation

[0032] Various embodiments of this utility model will be described with reference to the accompanying drawings. In the specification and drawings, elements with similar structures or functions will be represented by the same element symbols. It is understood that the drawings are for reference and illustration only and are not intended to limit the scope of this utility model. The dimensions shown in the drawings are merely for clarity of description and do not limit the proportional relationships or provide an exhaustive description of the utility model, nor do they limit the scope of this utility model.

[0033] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] This utility model proposes a special frequency converter for steeply inclined coal seam mining machines.

[0035] like Figure 1-3As shown, a frequency converter for a steeply inclined coal seam mining machine includes a frequency converter body 1 and a mining machine electrical control box 2, with the frequency converter body 1 installed inside the mining machine electrical control box 2. A guide slider 11 is provided at the bottom of the frequency converter body 1. The mining machine electrical control box 2 has at least one opening 21. A guide groove 22 and a limiting pin 23 are provided on the surface of the mining machine electrical control box 2 that contacts the bottom of the frequency converter body 1. The guide groove 22 extends from the opening 21 to the end away from the opening 21, and the limiting pin 23 is located at the end of the guide groove 22 away from the opening 21.

[0036] When installing the inverter body 1, one end of the inverter body 1 with the guide slider 11 first enters through the opening 21 of the coal mining machine electrical control box 2. The guide slider 11 cooperates with the guide groove 22, so that the guide slider 11 moves along the guide groove 22 from the opening 21 towards the limit pin 23. When the guide slider 11 abuts against the limit pin 23, the inverter body 1 is successfully pushed into place in the coal mining machine electrical control box 2, which simplifies the installation and greatly saves installation time.

[0037] like Figure 4 As shown, to securely fix the inverter body 1 inside the coal mining machine control box 2, a screw hole 13 is provided at the bottom of the inverter body 1. When the inverter body 1 is installed in the coal mining machine control box 2, the bottom end near the opening 21 has a protrusion 12 that protrudes from the end face of the inverter body 1 near the opening 21, and the screw hole 13 is provided in this protrusion 12. The surface of the coal mining machine control box 2 that contacts the bottom of the inverter body 1 has mounting holes that match the screw hole 13. After the inverter body 1 is successfully pushed into place inside the coal mining machine control box 2, the inverter body 1 can be fixed inside the coal mining machine control box 2 by passing screws through the screw hole 13 and the mounting holes.

[0038] To provide some cushioning when the guide slider 11 contacts the limiting pin 23, a limiting receiving groove is provided on the side of the limiting pin 23 facing the opening 21. The surface of the limiting receiving groove opposite to the guide slider 11 is a first inclined surface, which slopes downwards from the side where the guide slider 11 enters to the other side. The surface of the guide slider 11 opposite to the limiting receiving groove is a second inclined surface, which corresponds to the first inclined surface. When the inverter body 1 is installed in the coal mining machine control box 2, the contact area between the first and second inclined surfaces gradually increases until at least a portion of the guide slider 11 is received in the limiting receiving groove when the inverter body 1 is in place.

[0039] Typically, the surfaces of the coal mining machine's electrical control box 2 and the bottom of the frequency converter body 1 are coated with thermally conductive silicone grease. After the frequency converter body 1 has been installed and operated inside the coal mining machine's electrical control box 2 for a period of time, the capillary action of the thermally conductive silicone grease can make it difficult to separate the frequency converter body 1 from the coal mining machine's electrical control box 2. Therefore, an inwardly recessed guide limiting groove 24 is provided at the end of the guide groove 22 near the limiting pin 23. This allows a pry bar to be used to apply force to the guide limiting groove 24 to assist in disassembly when it is necessary to remove the frequency converter body 1 from the coal mining machine's electrical control box 2.

[0040] Furthermore, to facilitate the pushing and pulling of the inverter body 1 during installation, the inverter body 1 has two opposing side facades 14. The two side facades 14 are perpendicular to the bottom of the inverter body 1 and are arranged along the length of the guide groove 22. When the inverter body 1 is installed in the coal mining machine control box 2, the end of the side facade 14 near the opening 21 has a protrusion 15 extending beyond the end face of the inverter body 1 near the opening 21. A handle 16 is provided on the protrusion 15. Specifically, the handle 16 can be a square, round, or other shaped through hole opened on the protrusion 15.

[0041] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A frequency converter specifically designed for steeply inclined coal seam mining machines, characterized in that, It includes a frequency converter body and a coal mining machine electrical control box, wherein the frequency converter body is installed inside the coal mining machine electrical control box; The bottom of the inverter body is provided with a guide slider; The surface of the coal mining machine electrical control box that contacts the bottom of the frequency converter body is provided with a guide groove. The guide slider and the guide groove cooperate to allow the frequency converter body to move back and forth along the direction set by the guide groove.

2. The frequency converter for steeply inclined coal seam mining machines according to claim 1, characterized in that, The coal mining machine electrical control box has at least one opening, and the guide groove extends from the opening to one end away from the opening; A limiting pin is provided at the end of the guide groove away from the opening; The guide slider moves along the guide groove from the opening toward the limiting pin. When the guide slider abuts against the limiting pin, the inverter body is installed in place in the coal mining machine electrical control box.

3. The frequency converter for steeply inclined coal seam mining machines according to claim 2, characterized in that, The guide groove has an inwardly recessed guide limiting groove at one end near the limiting pin.

4. The frequency converter for steeply inclined coal seam mining machines according to claim 2, characterized in that, The bottom of the inverter body is provided with a screw hole; when the inverter body is installed in the coal mining machine electrical control box, the bottom end near the opening has a protrusion that protrudes from the end face of the inverter body near the opening, and the screw hole is provided in the protrusion. The surface of the coal mining machine electrical control box that contacts the bottom of the frequency converter body is provided with mounting holes that match the screw holes.

5. The frequency converter for steeply inclined coal seam mining machines according to claim 2, characterized in that, The limiting pin is provided with a limiting receiving groove on the side facing the opening; when the frequency converter body is installed in the coal mining machine electrical control box, at least a portion of the guide slider is received in the limiting receiving groove.

6. The frequency converter for steeply inclined coal seam mining machines according to claim 5, characterized in that, The surface of the limiting receiving groove opposite to the guide slider is a first inclined surface, which slopes downward from the side into which the guide slider enters to the other side. The surface of the guide slider opposite to the limiting receiving groove is a second inclined surface, which corresponds to the first inclined surface.

7. The frequency converter for steeply inclined coal seam mining machines according to any one of claims 1-6, characterized in that, The surface of the coal mining machine's electrical control box that contacts the bottom of the frequency converter body is coated with thermally conductive silicone grease.

8. The frequency converter for steeply inclined coal seam mining machines according to any one of claims 2-6, characterized in that, The inverter body has two oppositely arranged side facades, which are perpendicular to the bottom of the inverter body and are arranged along the length of the guide groove. When the inverter body is installed in the coal mining machine electrical control box, the side facade near the opening has a protrusion that protrudes from the end face of the inverter body near the opening, and the protrusion is provided with a handle.

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